Coal-stove



L. CRANDALL.

` Stove.

No. 29,249. Patented July V21-, 1860 I wu'zw" @754 @f1/w wm (www.

N. PETERS. Plmm-Lvllmgmpuor. wnslinglo. l1:

UNITED ST PATEN OFFICE.

LUCIUS CRANDALL, OF PLAINFIELD, NEW JERSEY.

COAL-STOVE.

Specification of Letters Patent No. 29,249, dated July 24, 1860.

To all whom it may concern:

Be it known that I, LUCIUS CRANDALL, of Plaineld, in the county of Essexand State of New Jersey, have invented certain new and usefulImprovements in Goal-Stoves; and I do hereby declare that the followingis a full, clear, and exact description of the same, reference being hadto the accompanying drawings, in which- Figure l is a vert-ical section.Fig. 2, is a similar section at right angles to Fig. 1, and Fig. 3, is ahorizontal section through the line S, S, in Figs. l and 2.

Similar letters indicate like parts in all the figures.

The nature of my invention consist in the combination of a peculiarlyconstructed fire box, capable of revolving on its axis with a peculiarmeans of connecting the same with the lues and also in connectiontherewith in certain specific arrangements of parts.

To enable others skilled in the art to make and use my invention, I willproceed to describe it by the aid of the drawings.

A, A, is a cylindrical or other convenient shaped case, with an ash pitat B; a hearth at C, and a large door at D, as represented. At the baseof A a partition c forms an annular flue E extending completely around Aand communicating therewith only through a vertical flue F at the rear.A pipe G leads from E to the chimney, and a short pipe H connects directtherewith from the case A as shown, which pipe is closed by a damper 7L.Another damper e is so arranged that when in the position shown at c, itpermits a direct draft from F to Gr, but when in the position shown ate, the draft is compelled to traverse the circuit of E before reachingG. A sliding damper I is arranged at the base of F so as to allow alarger opening therein if required and may be used for allowing a directdraft to Gr instead of e.

In suitable bearings in the case A, I mount a hollow sphere M upontrunnions m cast thereon, so that itis free to revolve around its axis.One of the trunnions is fitted to receive a crank L by which M may bereadily rotated. About one-half of this sphere -M is grated, as shown atN, and a cover n, is so fitted as to be readily removed for the purposeof charging it with coal. On the opposite side from N is an opening Ppartially closed by a grate. This opening is adapted to receive asliding pipe R which connects with the flue F. A handle 1" extendsthrough A to a convenient position, for the purpose of operating R so asto connect or disconnect M and F at pleasure.

In the top of A is a hot air chamber T which receives its air throughsuitable openings t, and discharges it through a flue which may openinto any room desired. The openings t may be replaced by tubes extendingthrough the interior of A if desired.

The operation is as follows: The chamber M is iilled wit-h coal andignited, the draft passing direct to the chimney at first but through Ewhen the fire is well started. The globular form of M causes the coal toburn to the best advantage while the whole of its surface is free toradiate heat. The ar rangement of the draft at the rear of M and causingthe air to pass horizontally through the fire enables the whole frontsurface of the tire to be exposed to view without permitting the escapeof gas. When the lire needs raking or cleaning out, the case A is closedtightly, the damper 7L, is opened to carry oif the dust, the pipe Rwithdrawn from M and the latter rotated until all the ashes are shakenout at the grate N. The pipe R is then connected, damper h closed, andthe stove is in readiness for burning. In kindling a ire the old coalneed not be removed, but by turning M the kindlings may be introducedbeneath or in front of the coal without difiiculty.

I am aware that a rotating grate or ire chamber was invented by BenjaminFranklin and has been used by others, and to such, broadly, I make noclaim, but

Having now fully described my improved coal stove what I claim as newtherein and desire to secure by Letters Patent is,

l. The combination and arrangement of the spherical fire chamber Mgrated at the side N and capable of revolving on the trunions m, withthe sliding tube R substantially as herein set forth.

2. The arrangement of the revolving Ves- In testimony whereof I havehereunto set sel M sliding tube R case A and dust damper my name in thepresence of tvvo subscribing h substantially in the manner and for theWitnesses.

purpose herein set forth. LUCIUS CRANDALL. 5 3. In combination with theabove the ar- VtnesseS:

rangement of thefiues F, E, Gr and d amloersl I, P. STILLMAN,

I and le, substantially as herein shown. Y I-I, H. BAKER.

